Custom post type permalink missing /post_type/ front

I have a custom post type:

register_post_type( 'tour',
    [
        'labels' => [
            'name'          => __( 'Tour shows' ),
            'singular_name' => __( 'Tour show' )
        ],
        'public'              => true,
        'menu_icon'           => 'dashicons-tickets-alt',
        'has_archive'         => 'tour', // also tried true
        'with_front'          => true,
        'exclude_from_search' => true, 
        'taxonomies'          => ['post_tag'],
        'rewrite'             => ['slug' => 'shows-on-tour'],
        'supports'            => ['title', 'editor', 'thumbnail']
    ]
);

(this has been butchered a bit while trying to make it work)

I’m having an issue where by when I do get_permalink($tour->ID) it returns:

example.com/post-title

This then redirects you to

example.com/shows-on-tour/post-title

The problem is I have a separate post type for “shows not on tour”, so whenever I link to:

example.com/post-title

I end up at:

example.com/shows-not-on-tour/post-title

How can I use get_permalink on either post type and have it return the full url to the post with the correct post type on the front?

Update

In the editor, when I edit the tour it clearly says:

example.com/shows-on-tour/post-title

and the not on tour:

example.com/shows-not-on-tour/post-title

So the issue must lie with how / where I’m calling get_permalink.